Synthesis and Study of Spectroscopic Properties of 5-(1-Oxido-3-pyridyl)-10,15,20-triphenyl Porphyrin and Its Zn(Ⅱ) Complex

Two novel sensitizers with pyridine-N-oxide zinc porphyrin and its zinc porphyrin as the anchor group and electron acceptor have been synthesized. The structures have been characterized by UV, elemental analyses and ~1H NMR. UV and fluorescence spectra show that they have good light absorbing properties in the range of visible light and suggest that they have potential applications in dye-sensitized solar cells.     

气相中Fe+催化CO与N2O循环反应的理论计算研究

采用密度泛函UB3 LYP/6-311+ G(2d)方法研究了Fe+在基态和激发态与CO与N2O反应的反应机理.全参数优化了反应势能面上各驻点的几何构型,用频率分析方法和内禀反应坐标(IRC)方法对过渡态进行了验证,并用UB3LYP/6-311++G(3df,3pd)、单点垂直激发等方法分别进行各驻点单点能校正,四重态和六重态反应势能面交叉点CP确定,计算结果表明,该反应为两步反应,且反应机理都为插入一消去反应,势能面上的两个交叉点能够有效降低反应的活化能,这在动力学和热力学上都是有利的.     

气相中Fe+催化CO与N2O循环反应的理论计算研究

采用密度泛函UB3LYP/6–311+G(2d)方法计算研究了Fe+在基态和激发态与CO与N2O反应的反应机理。全参数优化了反应势能面上各驻点的几何构型,用频率分析方法和内禀反应坐标（IRC）方法对过渡态进行了验证,并用UB3LYP/6–311++G(3df,3pd)、单点垂直激发等方法分别进行各驻点单点能校正,四重态和六重态反应势能面交叉点CP确定,计算结果表明,该反应为两步反应,且反应机理都为插入—消去反应,势能面上的两个交叉点能够有效的降低反应的活化能,这在动力学和热力学上都是有利的。     

微波辐射条件下N-芳基-N''''-(5-苯并呋喃基-1,3,4-噻二唑-2-基)脲的合成

在微波辐射条件下,以2-氨基-5-苯并呋喃基-1,3,4-噻二唑和N-取代三氯乙酰苯胺为原料,在固体氢氧化钠作用下,"一锅法"高产率合成了10种N-(5-苯并呋喃基-1,3,4-噻二唑-2-基)-N'-芳基脲,并通过IR、1H NMR和元素分析表征了目标产物的结构.     

Two Novel Coordination Polymers of Schiff Base Ligands: Synthesis,Crystal Structures and Antibacterial Properties Studies

Two novel complexes [Ag L~1(NO_3)H_2O]_n(1) and [Pb L_2(NO_3)_2]_n(2) were synthesized by the evaporation reaction with metal salts and Schiff base ligands. They were characterized by elemental analyses, IR spectra and X-ray single-crystal diffraction. 1 crystallizes in monoclinic, space group P21/c with a = 18.358(3), b = 10.0395(15), c = 13.4643(16) ?, β = 91.749(12)o, V = 2480.4(6) ?3, Dc = 1.597 g/cm~3, Mr = 596.35, F(000) = 1208, Z = 4, R = 0.0772 and w R = 0.0927. 2 crystallizes in monoclinic space group C2/c with a = 15.8549(10), b = 21.1988(17), c = 17.7198(12) ?, β = 105.829(8)o, V = 5729.9(7) ?~3, Dc = 1.645 g/cm~3, Mr = 709.63, F(000) = 2736, Z = 8, R = 0.0541 and w R = 0.1175. X-ray single-crystal diffraction experiments of 1 and 2 display that extensive π×××π stacking interactions and hydrogen bonds construct into a 2D rectangular network and a 3D supramolecular framework. The antibacterial properties of L1, L2, 1 and 2 were also studied.     

蕤核挥发油化学成分的分析

采用普通水蒸气蒸馏法提取蕤核挥发油,通过气相色谱-质谱(GC-MS)联用技术进行分析鉴定,共鉴定出33种化学组分,占挥发油总量的78.038%.主要含有斯巴醇(10.265%),亚油酸(8.075%),β-石竹烯(7.278%),7-辛烯-4-醇(6.572%),枯茗醛(4.435%),α-非兰烯醇(4.093%)等。     

微波辐射条件下N-芳基-N′-(5-苯并呋喃基-1,3,4-噻二唑-2-基)脲的合成

在微波辐射条件下,以2-氨基-5-苯并呋喃基-1,3,4-噻二唑和N-取代三氯乙酰苯胺为原料,在固体氢氧化钠作用下,"一锅法"高产率合成了10种N-(5-苯并呋喃基-1,3,4-噻二唑-2-基)-N'-芳基脲,并通过IR1、H NMR和元素分析表征了目标产物的结构.     

基于贵金属纳米颗粒生长的比色传感研究进展

近年来,作为颜色标记和信号发生器的贵金属纳米粒子由于其简单性和实用性而被广泛用于比色测定和传感的研究当中。本文综述了近十年基于贵金属纳米粒子生长的比色传感器策略和应用的最新进展,总结了基于贵金属纳米颗粒生长的单色及多色传感器的传感原理、分类及前沿应用,探索了其比色传感的信号产生、分类和放大机制。由于贵金属纳米粒子在不同尺寸、距离、形状、成分等基底上的生长会产生不同的LSPR共振峰以及显著的传感信号变化,我们详细讨论了贵金属纳米粒子在金纳米棒等晶种基底上生长的比色传感。最后,我们对目前该比色传感面临的挑战和未来前景进行了展望。